Chart or map.



A. B. MAULL.

CHART 0R MAP.

APPLIGATION FILED MAY 21, 1912.

1 1 1 0,21 7, I Patented Sept. 8, 1914- THE NORRIS PETERSCQ, PHOTO-LITHQ. WASHINGmN. D. C

I nnirnn STATES PATENT orrlon;

ALLEN B. MAULL, or BALTIMORE, MARYLAND.

CHART on MAP.

To all whom it may concern Be itknown that I, ALLEN B. MAULL, a citizen of the United States, residing at Baltimore, in the State of Maryland, have invented certain new and useful Improvements in Charts or Maps, of which the following is a specification.

This invention relates to improvements in guides, charts or maps.

One of the objects of the invention is to provide simple means whereby predetermined places may be readily located.

A further object is to provide means for quickly and accurately determining the dis tance between any two points upon a map or chart.

lVhile the invention is particularly useful to aid strangers in finding their way around in cities, it is just as applicableas a guide when the chart represents localities in an entire county or State. v

The invention will be hereinafter fully set forth and particularly pointed, out in the claims. I

The inventive idea is disclosed in the accompanying drawing wherein,

Figure 1, illustrates a flat face view of the improved guide. Fig, 2, shows an edge view of the same, Fig. 3, illustrates a cross-sectional detail on the line 33 of Fig.1.

' and Fig. h shows another cross-sectional detail on the line 41 of Fig. 2.

In the drawing the numeral, 1, designates a circular disk having a guide, map or chart, 2, on one flat face thereof, and said chart being provided with a series of concentric circular lines, 3, which form a plurality of circular concentric spaces, l. The periphery of the disk is also provided with a series of numbers or characters, 5, for convenience in locating particular places on the chart or map, as will presently be more fully set forth. Thepoints of the compass may, and preferably are provided on the face of the disk as at, 6.

In order to. support the disk and permit its ready and handy rotation I provide two bars, 7, and, 8, respectively. Said bars are preferably of concave-convex form in cross section. Thelbars extend radially across the disk, one at each side of thelatter and a pin, 9, extends through thecenter 'ofthe disk and one end of said pin engages the inner end ofbar, 7, while the other end. of said.

pin engages the inner end of the bar, 8. At

Specification of Letters Patent.

Application filed May 21, 1

PatentedSept. s, 19: 14. Serial No. 698,770.

the outer ends, the bars, 7, and, 8, are held in a spaced-apart condition by means of spacer blocks or sleeves, 10, and suitable fastenings, such as rivets, 11, extend through the said ends and through the blocks or sleeves whereby to rigidly secure the bars together and form ahandle, 12.

The bar,7, which extends radially across the face of the guide or chart is provided on its convex outer surface with a scale, 13, indicating miles and fractions thereof covered by the guide or chart from the center, 9, to the periphery thereof. Obviously, this scale may be different from that shown in the present example which latter is merely illustrative in this case. Also it will be noted that the bar, 7, is provided on its outer convex surface with the letters, A, B, C, and, D. These letters are so placedon the handle that each will have position to coincide with one of the concentric circular spaces,4, on the gulde or chart face. The arrangement of letters on the bar andjthe peripheral numerals on the face of the guide or chart will so coact as to readily locate anypartloular place on the gu1de,,for ex ample, if a person be informed th ta pal;

ticular place on the guide can be found at C2, the operator need onlyrotate the disk until the numeral, 2, is brought. adjacent to the side'. of bar, 7, and then cast the eye along the bar to the space, C, whereupon the desired point will be definitely and promptly located. The bar, 7, is provided with a longitudinal slot, 14:, and a stud,15,:projects through said slot to the concave side of said bar and carries a spring plate or disk, '16, i

on its inner end. This plate or disk, 16, ex tends across the under side of the bar, 7, and has its edges, 17, in contact with the concavesurfacelof the bar at each side of the slot, as shown in Fig. 4;, and a head 18, is provided onthe innerend of-the stud to prevent the plate or disk, 16, from becoming displaced from the inner end of the stud. The function of this plate or. disk, 16, is to exert an inward pull on the stud by the con tact of the opposite edges of the plate with the concave surface of the bar,1' and by this means the stud, will be yieldingly held inwardly.

On the outer convex side of the bar,7, the

stud, 1 5, pivotally engages one end of a measuring or scale arm, 19, so as to connect a said arm with the bar, 7, in such a way as to allow the arm to swing with the stud as the pivot. As the stud has longitudinal movement in the slot, 14, of bar, 7, and the scale arm is pivotally attached to the stud, both stud and arm may be moved lengthwise of the bar, 7, and in addition to such long'itudi" nal movement the scale arm may swing with respect to said bar.

By referring to Fig. 4, it will be noted that the scale arm, 19, is also concavo-con vex in cross-section and when turned in a direction parallel with and on top of bar, 7, the inner concave side will lie close on the outer convex side of said bar. By this means the arm and bar will be locked together when they are parallel and one on top of the other,the plate, 16, pulling on the stud and holding the arm and plate in such locked position. A suitable scale, such as that designated, 20, is provided on the arm to indicate distance by miles and fractions thereof. I

A suitable compass, 21, is preferably carried onthe outer end of the stud, 15, in order that the points of the compass may be readily determined and if desired, the guide or chart turned in a position corresponding to that indicated by the compass needle, thus enabling a more accurate and definite location and direction to be ascertained.

The outer end of scale arm, 19, carries an extension arm, 22, which has a continuation of the scale, 20, and the scale arm and the extension arm are connected by a pivot, 23, in'order that they may be adjusted simultaneously with respect to the bar, 7, or independently with respect to said bar. The extension arm, 22,is also concavo-convex in cross-section and a spring washer or plate, 241, shown in broken lines in Fig. 1, and similar to the plate, 16, serves to yieldingly hold the extension and scale arm in the adjusted position.

From the foregoing explanation 1t Will be understood that the extension arm may be turned parallel with and on top of scale arm, 19, with the concave and convex surfaces confronting and both arms may then be swung on the stud, 15, and the concave side of scale arm, 19, laid on top of convex side of bar, 7, as shown in Fig. 2,-thereby all the arms will be locked in place against the bar 7.

Iii practice I provide the under or bottom side of disk, 1, with an alphabetical list of the various points of interest, streets, roads, towns or what not, which are located on the front side of the disk, and adjacent to each name in the list there is provided a letter and; num'eral,the letter indicating in which circular space the place will be found and the numeral showing the radial position of that same place, consequently by turning the disk until the numeral on the periphery will register with the slot in thehandle and then casting the eye in thecircular space corresponding to the letter, the place will be located on the guide.

After a given place has been located the stud, 15, may be moved longitudinally in the slot, 14:, until it has positionover that place, on the guide and the direction and distance of any 1 other predetermined point on the guide may be approximately ascertained by turning or swinging the scale arm, 19, and

if that is not sufliciently long to project over such second point, then by turning the extension arm, 22, to the point or location'desired.

Having thus described my invention what I claim and desire to secure by Letters Patent is 1. The combination with a map or chart, of a locating arm pivotally connected thereto, and a scale arm adjustably connected with said locating arm.

2. The combination with a map or chart, of a locating arm pivotally connected thereto, and a scale arm having one end adjustably connected with said locating arm.

3. In a device of the character described the combination with a chart, of a locating arm pivotally connected to the chart and a second arm pivotally carried by and movable independently of the said locating arm and said second pivoted arm also having a scale.

4L. The combination with a map or chart, of a locating arm pivotally connected thereto, and a scale arm having one end adjustably connected. with the locating arm between the endsof the latter.

5. The combination with a map or chart, of a locating arm pivoted at one end thereto, and a scale arm havin one end adjustably connected to said locatmgarm between the pivot and the free end thereof.

'6. The combination with a map or chart, of a locating arm pivoted thereto, and a scale arm pivotally and slidably connected with said locating arm.

7. The combination with a map or chart, of a locating arm pivotally connected thereto, said arm being slotted, and a scale arm having a pivot member adjustably mounted in the slotted portion of said locating arm.

'8. In a device of the character described the combination with a chart, of a bar pivoted to the centenof the chart and extending radially therefrom; a scale arm slidably carried on said radial bar and a second arm pivoted to the scale arm.

9. In a device of the character described the combination with a chart, of a bar pivoted to the center of the chart and extending radially therefrom; a scale arm; means for pivo tally and slidably connecting the scale arm and radial bar and a second arm pivotally connected to the outer end of the scale arm. I

I 10. In a device ofthe character described the 5 convex surface of the said bar, and means for pivotally connecting the bar and arm.

11. In a device of the character described the combination With a bar having a convex outer surface, of a chart pivoted to and r0- tatably carried by said bar; a scale arm having a concave inner surface to seat against the convex surface of the said bar, and said scale arm having a convex outer surface; means for pivotally connecting the bar and arm; a second-arm also hav-' ing a concave inner surface to seat on the convex outer surface of the scale arm and means for aivotally connecting saidscale arm and saic second arm.

12. In a device of the character described I the combination with a concavo-convex bar having a longitudinal slot, of a chart rotatably carried by said bar; a scale arm having a concave inner side to seat-over the convex surface of the said bar; a spring plate on the concave side of the said bar and a pivot stud extending through the slot of the bar and also connecting said scale arm and the spring plate at the'concave side of the bar.

13. The combinationvvith a map. orchart, of means for locating places thereon comprising a graduated locating member pivotally supported tofreely swing over the face of said ma or chart in a plane parallel to the plane 0 the latter, said locating member being provided with a distance scale member.

G. FEED. VOGT, CHARLES B. MANN, Jr.

In testimony whereof I affixmy signature- Copies of this patent may be obtained for five cents each, by addressing the Commissioner of latentl; 

